| UDF - SPELLNUMBER |
| UDF - SPELLNUMBERREVERSE |
| UDF - STRINGTOROMAN* |
| UDF - SUMBETWEEN |
| UDF - SUMDIGITS |
| UDF - SUMFORMAT |
| UDF - SUMFORMAT_CELLCOLOR |
| UDF - SUMFORMAT_FONTBOLD |
| UDF - SUMFORMAT_FONTCOLOR |
| UDF - SUMVISIBLE |
| UDF - SUMVISIBLEIFS |
| UDF - TIMENOW |
| UDF - TRANSLATE |
| UDF - UNIQUEITEMS* |
| UDF - USERNAME |
| UDF - VINTERPOLATE* |
| UDF - VLOOKUPINTERPOLATE |
| UDF - WEEKNUMBER |
| UDF - WHICHDAY* |
| UDF - WORDCOUNT |
| UDF - WORKBOOKFILEEXTENSION |
| UDF - WORKBOOKFILENAME |
| UDF - WORKBOOKFULLPATH* |
| UDF - WORKBOOKNAME* |
| UDF - WORKBOOKPATH |
| UDF - WORKBOOKPATHFILENAME |
| UDF - WORKBOOKPATHFILENAME_SHEET |
| UDF - WORKBOOKPROPERTIES |
| UDF - WORKDAY6 |
| UDF - WORKDAYSMISC |
| UDF - WORKSHEETNAME |
| UDF - WORKSHEETNUMBER |
| UDF - WORKSHEETSCOUNT |
| UDF - XDATE |
| UDF (User Defined Function) |
| UDFs (User Defined Functions) |
| UI Editor - Ribbon |
| Unary Operator |
| Underlining |
| Underlying Formulas |
| Underlying Values |
| Undo |
| Undo Saved Changes |
| Undo Typing |
| Unfreeze Panes |
| Ungrouping Columns |
| Ungrouping Data |
| Ungrouping Objects |
| Ungrouping Rows |
| Ungrouping Sheets |
| Ungrouping Worksheets |
| Unhide all Hidden Worksheets |
| Unhide Cells |
| Unhide Columns |
| Unhide Personal.xlsb |
| Unhide Rows |
| Unhide Sheets |
| Unhide Workbook |
| Unhide Worksheets |
| Unhiding Columns |
| Unhiding Rows |
| Unhiding Sheets |
| Unhiding Windows |
| Unhiding Workbooks |
| Unhiding Worksheets |
| UNICHAR - Built-in Function |
| UNICODE - Built-in Function |
| Unified Labelling |
| UnInstall Add-ins |
| Union Operator |
| UNIQUE - Built-in Function |
| Unique Items - Filtering |
| Unique Items - Sorting |
| Unique Items in a List |
| Unique List |
| Unique Records |
| Unique Records in a Range |
| Unique Values |
| Unique Values in a List |
| Unique Values in a Table |
| UNIQUEITEMS - UDF* |
| Unit Conversion |
| Units of Measure |
| Unlock Cells |
| Unlock Formulas |
| Unlocking Cells |
| UnMerge Cells |
| Unpivot |
| Unprotecting Cells |
| Unprotecting Macros |
| Unprotecting Workbooks |
| Unprotecting Worksheets |
| UNREGISTER - Excel 4 |
| Unrestricted Access |
| UnSelect Cells |
| Unsharing Workbooks |
| Unused Custom Formats |
| Unused Number Formats |
| Unviewable Macro |
| Unviewable Project |
| Update Formulas |
| Update Functions |
| Update Linked Values |
| Update Linked Workbooks |
| Update Links |
| Update Records |
| Update Remote References |
| Update Values Dialog Box |
| Update Worksheet |
| Updates - Versions |
| Updating a Chart |
| Updating a List |
| Updating a Table |
| Updating a Worksheet |
| Updating Charts |
| Updating Formulas |
| Updating Hyperlinks |
| Updating Links |
| Updating Lists |
| Updating Tables |
| Updating XML Files |
| Upload Center |
| UPPER - Built-in Function |
| Upper Case |
| Upper Case to Lower Case |
| Use 1904 Date System |
| Use GetPivotData Functions |
| Use System Separators |
| Use Table Names In Formulas |
| Used Range - Worksheet |
| Useful Dates |
| Useful Formulas |
| Useful Formulas - Conditional |
| Useful Formulas - Counting |
| Useful Formulas - Data Validation |
| Useful Formulas - Date |
| Useful Formulas - Formatting |
| Useful Formulas - Lookup |
| Useful Formulas - Number |
| Useful Formulas - Summing |
| Useful Formulas - Text |
| Useful Formulas - Time |
| User Defined Functions - Adding Arguments |
| User Defined Functions - Adding Categories |
| User Defined Functions - Adding Descriptions |
| User Defined Functions - ASAP |
| User Defined Functions - Counting |
| User Defined Functions - Custom Functions |
| User Defined Functions - Date & Time |
| User Defined Functions - Formatting |
| User Defined Functions - Information |
| User Defined Functions - JavaScript* |
| User Defined Functions - KuTools |
| User Defined Functions - MoreFunc |
| User Defined Functions - Other |
| User Defined Functions - OzGrid |
| User Defined Functions - Power Utility Pack |
| User Defined Functions - Professor Excel |
| User Defined Functions - Recalculating |
| User Defined Functions - Returning Arrays |
| User Defined Functions - Statistical |
| User Defined Functions - Summing |
| User Defined Functions - Text |
| User Defined Functions (UDFs) |
| User Defined Types - VBA |
| User Developed Applications (UDA) |
| User Feedback - Feedback Portal |
| User Feedback - UserVoice |
| User Name |
| User Options |
| User Templates - Location |
| Userforms - VBA |
| USERNAME - Custom Function |
| USERNAME - User Defined Function |
| UserVoice / Tech Community |
| UserVoice Feedback |
| Using $ in Cells |
| |